The answer to 'irrigation system has weeds' is that weeds growing in and around an irrigation system are a common problem. Weeds can clog sprinkler heads, grow in the water lines, and reduce the efficiency of the system. Common causes include poor drainage, excessive soil moisture, and gaps in the landscape where weeds can take root.
Symptoms of weeds in an irrigation system include reduced water pressure, uneven water coverage, and visible weed growth around sprinkler heads and in the landscaping. To solve this issue, you'll need to regularly maintain and clean the irrigation system, improve drainage, and use targeted weed control methods. For severe weed infestations or complex irrigation problems, it's best to call a professional landscaper or irrigation specialist.